* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        #wrapper {
            max-width: 1200px;
            margin: 0 auto;
            background-color: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        }

        header {
            background: linear-gradient(135deg, #2c5aa0 0%, #1a3d7a 100%);
            color: #fff;
            padding: 40px 20px;
            text-align: center;
            border-bottom: 4px solid #e8491d;
        }

        header h1 {
            font-size: 2.5rem;
            font-weight: 300;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }

        .subtitle {
            font-size: 1.1rem;
            opacity: 0.95;
            font-weight: 300;
        }

        nav {
            background-color: #fff;
            border-bottom: 2px solid #e0e0e0;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            padding: 0;
            margin: 0;
        }

        nav ul li {
            margin: 0;
        }

        nav ul li a {
            display: block;
            padding: 18px 25px;
            color: #2c5aa0;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
        }

        nav ul li a:hover {
            background-color: #f0f4f8;
            border-bottom-color: #e8491d;
            color: #1a3d7a;
        }

        main {
            padding: 40px 20px;
        }

        article {
            max-width: 900px;
            margin: 0 auto 40px;
        }

        article h1 {
            color: #2c5aa0;
            font-size: 2rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #e8491d;
        }

        article h2 {
            color: #1a3d7a;
            font-size: 1.6rem;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        article h3 {
            color: #2c5aa0;
            font-size: 1.3rem;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article p {
            margin-bottom: 15px;
            text-align: justify;
            color: #444;
        }

        article b,
        article strong {
            color: #1a3d7a;
        }

        article i,
        article em {
            color: #555;
        }

        .transition-section {
            max-width: 900px;
            margin: 0 auto 40px;
            padding: 25px;
            background-color: #f8f9fa;
            border-left: 4px solid #e8491d;
        }

        .transition-section p {
            color: #444;
            line-height: 1.7;
        }

        .links-section {
            max-width: 1100px;
            margin: 40px auto;
            padding: 40px 20px;
            background: linear-gradient(to bottom, #f8f9fa 0%, #ffffff 100%);
            border-radius: 8px;
            border: 1px solid #e0e0e0;
        }

        .links-section h3 {
            color: #2c5aa0;
            font-size: 1.5rem;
            margin-bottom: 20px;
            margin-top: 30px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e8491d;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px 30px;
            margin-bottom: 30px;
        }

        .links-section ul li {
            padding-left: 20px;
            position: relative;
        }

        .links-section ul li:before {
            content: "▸";
            position: absolute;
            left: 0;
            color: #e8491d;
            font-weight: bold;
        }

        .links-section ul li a {
            color: #2c5aa0;
            text-decoration: none;
            transition: all 0.2s ease;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #e8491d;
            padding-left: 5px;
        }

        footer {
            background-color: #2c5aa0;
            color: #fff;
            padding: 30px 20px;
            text-align: center;
            margin-top: 40px;
        }

        footer p {
            margin: 5px 0;
            font-size: 0.9rem;
        }

        footer a {
            color: #fff;
            text-decoration: none;
            margin: 0 10px;
            opacity: 0.9;
            transition: opacity 0.2s ease;
        }

        footer a:hover {
            opacity: 1;
            text-decoration: underline;
        }

        .footer-nav {
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }

        @media (max-width: 768px) {
            header h1 {
                font-size: 1.8rem;
            }

            .subtitle {
                font-size: 1rem;
            }

            nav ul {
                flex-direction: column;
            }

            nav ul li {
                width: 100%;
                text-align: center;
                border-bottom: 1px solid #e0e0e0;
            }

            nav ul li:last-child {
                border-bottom: none;
            }

            nav ul li a {
                padding: 15px 20px;
            }

            main {
                padding: 25px 15px;
            }

            article h1 {
                font-size: 1.6rem;
            }

            article h2 {
                font-size: 1.4rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .transition-section {
                padding: 20px 15px;
            }

            footer a {
                display: inline-block;
                margin: 5px 10px;
            }
        }

        @media (max-width: 480px) {
            header h1 {
                font-size: 1.5rem;
            }

            header {
                padding: 30px 15px;
            }

            .subtitle {
                font-size: 0.9rem;
            }
        }